class movie : ?title:string -> ?year:int -> Int64.t -> object
	method id : Int64.t

	method title : string
	method set_title : string -> unit
			
	method year : int 
	method set_year : int -> unit

	method desc : string
	method set_desc : string -> unit
end

class movies_dal : string -> object 
	method load_movies : unit -> movie list
	method delete_movie : movie -> unit
	method add_movie : string -> int -> string -> movie
end

